Development Tools

top
with RI78V4
Coding
SERVICE CALLS
Synchronization and Communication Functions (Semaphores)
ref_sem

ref_sem

Outline

Reference semaphore state.

C format


ER ref_sem ( ID semid, T_RSEM *pk_rsem );

Assembly format


MOVW BC, #LOWW(_pk_rsem) MOV A, #semid CALL !!_ref_sem

Parameter(s)


I/O	Parameter	Description
I	ID semid;	ID number of the semaphore to be referenced.
O	T_RSEM *pk_rsem;	Pointer to the packet returning the semaphore state.

Explanation

Stores semaphore state packet (such as existence of waiting tasks) of the semaphore specified by parameter semid in the area specified by parameter pk_rsem.

Note For details about the semaphore state packet, refer to "12.5.2 Semaphore state packet".

Return value


Macro	Value	Description
E_OK	0	Normal completion.